You do have conductor size and MCB rating. Conductors will likely be 2.5 or 4 mm2, MCB 16, 20, or 32 A. 16 or 20 indicate a radial, 2.5 mm2 and 32 A a ring, 32 A and 4 mm2 a radial. If you have 2.5 mm2, 32 A and no continuity on only one or two conductors, it’s likely a broken ring, if there’s...